Transformer



Jan. 4 1927.

J. L. SCHERMERHORN TRANSFORMER Filed Nov. 5. 1925 u lllllll :mi 71 llrllirll l i i l i l ||IM l l I l ll'l if 8 n /O M ial .2,

A TTR E Patented 4, 1927.

UNITEDI STATES 1,612,947 PATENT carica.v

A JOHN SCHERHEBHOBN, 0F NEWARK, NEW JERSEY, ASSIGNOB k'1.0 AMERICAN TBANBFOB'KEB COMPANY, 0F NEWARK, NEW JERSEY.

/ TRANSI'OBHEB.

Application illed November 6, 1925. Serial No, 67,892.

by reference to the attached drawing taken in connection with this specification.

In the drawing, Figure 1 is a perspectlve -view of the complete transformer.

Figure 2,^ is a view of the combined side and end piece of the transformer case, 1n extended position.

Fi ure 3, is a fragmentary view of a modified orm showing a method of locking the terminal connecting rack in position.

Figure 4, is a vlew similar to Figure 3, but of a4 further modified form.y

Figure 5, is an end view of the windings of the transformer, while Figure 6,. is a longitudinal section through the winding without the core.

Figure 7, showsa further modified form for holding the connecting rack in place.

Figure 8 is a plan view of one end of the casing with the top plate and terminal board removed. l

v Referring now to the details wherein like numbers refer to corresponding parts in the various views: The transformer com rises a. rimary'winding. -1, Aand a pair. o secon aries 2 and 3 preferably wound'in two coils and suitabl connected. The opening 4, is to receive t e central part of the core laminations which are preferabl E shaped, but are not shownand describe herein except tosay that .the laminations are built up around the windin in the usual way, such` as disclosed in' hermerhorn et a1.

Patent 1,579,955, issued April 6, 1926, and

then the casing assembled around lthe completed unit. ff i f v The. casingf consists of two similar combined side and end pieces 6, and similar top and-bottom pieces 7. Piece 6, is made of one piece of suitable metal, the side ortion being included betweenthe dotted ines 8 and 9 on which lines the piece 6 is bent to form the end portions 10. The end portion 10, is formed or bent on the lines 11, l12 and 13, to form a channel Ishaped part 14, which is adapted to engage and securely hold the ends of the core laminations, lugs 15 are provided on `opposite sides of the end portions 10, whichare bent out at right angles tothe channel as shown in Figure l each lug 15 is provided with a hole 16, and through these holes are passed eyelets 17, which also go throu h the top and bottom pieces 7, thereby rivg casing together.

It will be understood that each of the members 6, extends half-way around the transformer and come to ether on line 30, the extremit ofl one of t e pieces 6, being bent on the ine 29, to lock behind the ed e 30, of the other piece, as is more clear y shown in a partial plan View shown in Figure 8, it being understood that the parts are locked in reverse position on the opposite end of the transformer casing. The edge 29 maybe positioned or extended to any satisfactory distance, even to the point of being over lthe end surface of the channel, as shown by the dotted line 32, extending from the edge 3l as illustrated in Figure 8, thereby forming a very secure, lock. Each of the pieces6 have portions cut away at 18, leaving a tongue 19.I Mounted in the cut away portions or notches 18, and preferably back of the tongue 19, is a terminal connecting board or strip of some good strong insulatin material. Mounted on opposite ends of t e terminal board 20, in any satisfactory manner, as by eyelets 21, are ter-i minals 22,.'each havin a finger 23bent over and extending throug connecting board 20, thereby actin as a dowel to prevent terminals 2 2 from s ifting in their position. Furthermore the bent over ends or dowels 23, also serve as means for connecting the tereting the parts of the g minals of the transformer windin s to the terminals 22, it being understood t at these connections are made before the bottom plate 7, is put in position, and referably the terminals of the primary winding being connected to the terminals on one strip and the ends of the'secondary winding to the terminals on the connecting strip on the opposite side of the transformer. If desired the transformerwinding ends may be reinforced and brought through the eyelets 21, and the ends passed through small holes the side piece for holding the terminal board in place.

7 A transformer comprising a core, windings on the core and a casing completely enclosing the core and windings, said casing lugs on both sides and opposite ends of the channel, eyelets passingthrough the lugs land the top and bottom plates for fastening said casing parts together, said eyelets serving as mounting means for the transformer, a terminal connecting board ,having terminals fastened thereto positioned in said cut out portions and means passing through the tongue and` connecting board for holding the latter in place.

. 8. A transformer comprising a core, windngs'on the core and a casing completely enclosing the core and windings, said casing consisting' of two similar top and bottom pieces and two similar combined side and end pieces, said side pieces having\portions cut t0 out on one edge forming a tongue, said side pieces being formed into ends on a line near the extremity away from the tongue, of a cut out portion, said ends having portions formed in the shape of a channel and having lugs on both sides and opposite ends of the channel', said channels engaging the core lamination to hold them in place, rivet means passing through the lugs and the top and bottom plates for fastenlng said casing parts together, a terminal connecting board having terminals secured thereto positioned inl said cut out portions and means cooperating between the terminal board and the side piece for holding the terminal board in place.

9. A transformer comprising a core, windings on the core and a casing completely enclosing the core and windings, said casing consisting of two similar top and bottom pieces andV two similar combined side and end pieces, means for fastening al1 of said pieces together, said side .pieces having portions removed to form a tongue, a terminal connecting board positioned across the openin formed by said removed portions and su stantiallclosing said openings, means cooperating etween the terminal board and the tongue for holding the terminal board in place, and terminals mounted on each el of the terminal board. l

In testimony whereof I aiiix my signature.'

JOHN SCHERMERHORN. 

